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公开(公告)号：US20170342836A1
公开(公告)日：2017-11-30
申请号：US15680640
申请日：2017-08-18
CPC分类号： E21D20/021 , E21D20/02 , E21D20/023 , E21D20/028 , E21D21/0006 , E21D21/0026 , E21D21/004 , E21D21/0046 , E21D21/008 , E21D21/0086
摘要： A rock bolt includes an elongate metallic body having a first end and an opposed second end, a threaded portion at the second end, for attaching thereto and locating thereon, a nut and a bearing plate, a mechanical anchor at, or at least partially located on, a first end portion of the body and a first resistive anchor, located between the threaded portion and the mechanical anchor.
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公开(公告)号：US20210071525A1
公开(公告)日：2021-03-11
申请号：US16644619
申请日：2018-09-07
发明人： Martin CAWOOD , Henri VISSER , Adrian BERGHORST
摘要： A rock anchor assembly includes: a tubular sleeve between first and second ends, having an anchor retaining portion opening on the second end; a rock anchor with an elongate body extending between distal and proximal ends, received in the tubular sleeve with the proximal and distal ends of the body projecting from the first and second ends respectively of the sleeve; a tensioning and locking assemblage on the anchor body between the proximal end and the first end of the sleeve, a forward part being engageable with the first end of the sleeve; and a mechanical anchor engaged to the anchor body at the distal end which, from an unexpanded configuration, expands radially to an expanded configuration. The anchor retaining portion at least partially retains the mechanical anchor in the unexpanded configuration. The anchor retaining portion expands circumferentially to accommodate retracted ingress of the anchor in the expanded configuration.
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公开(公告)号：US20180230801A1
公开(公告)日：2018-08-16
申请号：US15746215
申请日：2015-09-16
IPC分类号： E21D21/00
CPC分类号： E21D21/0033 , E21D20/003 , E21D20/02 , E21D21/0046
摘要： A friction bolt assembly includes: an expansible sleeve having a tubular body between leading and trailing ends, which body has a longitudinally extending formation about which the body resiliently deforms and which formation extends along at least part of the body, ending at the body leading end; a rod extending through the sleeve body and between first and second ends and on which a projecting part is defined between the trailing end of the sleeve body and the second end; an expansion element on the rod at the first end; a first load bearing formation on the projecting rod part, moveable along the projecting part to abut the sleeve trailing end; a load applicator on the projecting part of the rod; and a second load bearing formation mounted over the projecting part of the rod between the first load bearing formation and the load applicator unit.
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公开(公告)号：US20180030832A1
公开(公告)日：2018-02-01
申请号：US15551970
申请日：2015-08-03
CPC分类号： E21D21/008 , E21D20/026 , E21D21/006 , F16G11/04
摘要： Disclosed is a cable anchor assembly including: a cable anchor body longitudinally extending between leading and trailing ends; a tensioning device with an outer member having first and second ends and a threaded through passage between the ends and an inner member which threadedly engages the threaded passage of the outer member and fixedly attached to the cable anchor body at or towards the trailing end; a faceplate engaging the cable anchor body between the leading end and the tensioning device. In use, with the cable anchor body inserted in a borehole and anchored therein, the faceplate positioned against a rock face and the first end of the outer member abutting the faceplate, the outer member is rotatable relative to the inner member, causing the inner member to move within the passage towards the second end of the outer member, drawing on the cable anchor body, tensioning the body.
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